Features 1、OPERATION PRINCIPLE: Press the knife switch to make the bottom fan blade rotate to generate power, let the ball rise to the suspension, and can be closed by returning knife switch to original position 2、EASY TO OPERATE AND INSTALL: Original ecological wood, light and convenient, easy to operate, safe, healthy and environmentally friendly. Laser cutting surface is smooth and burr free, easy to assemble 3、LAY BASIC FOR INVENTIONS: The scientific knowledge in small production can lay the basic for future inventions, mathematics, physics and chemistry learning 4、IMPROVE INNOVATIVE: Improve children's innovative awareness and ability, let children win at the starting line, and become more competitive in society 5、CULTIVATE INTEREST OF LEARNING: Cultivate children's interest in learning and desire for knowledge, which helps to improve children's academic performance 6、STRENGTHEN HANDS ON ABILITY: Children today generally lack hands on ability, this toy can strengthen the training of hands on ability, so that knowledge is no longer on paper Specification Item Type: Students Science Assembly Toy Material: Beech Uses: Handmade, puzzle teaching Paint Material: Wood without paint Package List 3 x Wooden Board 1 x Motor 1 x User Manual 1 x Glue 1 x Blade 1 x Ball 1 x Battery Box